'One' in the Bible

Only conduct yourselves in a manner worthy of the gospel of Christ, so that whether I come and see you or remain absent, I will hear of you that you are standing firm in one spirit, with one mind striving together for the faith of the gospel;

make my joy complete by being of the same mind, maintaining the same love, united in spirit, intent on one purpose.

Do nothing from selfishness or empty conceit, but with humility of mind regard one another as more important than yourselves;

For I have no one else of kindred spirit who will genuinely be concerned for your welfare.

Brethren, I do not regard myself as having laid hold of it yet; but one thing I do: forgetting what lies behind and reaching forward to what lies ahead,